KR20080075991A - Apparatus and method for receiving a disaster air in a t-dmb - Google Patents

Apparatus and method for receiving a disaster air in a t-dmb Download PDF

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Publication number
KR20080075991A
KR20080075991A KR1020070015301A KR20070015301A KR20080075991A KR 20080075991 A KR20080075991 A KR 20080075991A KR 1020070015301 A KR1020070015301 A KR 1020070015301A KR 20070015301 A KR20070015301 A KR 20070015301A KR 20080075991 A KR20080075991 A KR 20080075991A
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KR
South Korea
Prior art keywords
tii
disaster
signal
terrestrial dmb
transmitter
Prior art date
Application number
KR1020070015301A
Other languages
Korean (ko)
Inventor
정우석
Original Assignee
주식회사 대우일렉트로닉스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 주식회사 대우일렉트로닉스 filed Critical 주식회사 대우일렉트로닉스
Priority to KR1020070015301A priority Critical patent/KR20080075991A/en
Publication of KR20080075991A publication Critical patent/KR20080075991A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/49—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying locations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/68—Systems specially adapted for using specific information, e.g. geographical or meteorological information
    • H04H60/73—Systems specially adapted for using specific information, e.g. geographical or meteorological information using meta-information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/485—End-user interface for client configuration
    • H04N21/4854—End-user interface for client configuration for modifying image parameters, e.g. image brightness, contrast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/488—Data services, e.g. news ticker
    • H04N21/4882—Data services, e.g. news ticker for displaying messages, e.g. warnings, reminders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/11—Aspects of broadcast communication characterised by the type of broadcast system digital multimedia broadcasting [DMB]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Human Computer Interaction (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Circuits Of Receivers In General (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

An apparatus and a method for receiving disaster broadcasting in a T-DMB(Terrestrial-Digital Multimedia Broadcasting) receiver are provided to generate a disaster notification signal by analyzing a TII(Transmitter Identification Information) signal of a disaster broadcasting stream or general broadcasting stream in a standby mode or normal mode state, thereby informing a user of generation of disaster. A TII timing detecting module(106) detects timing information of a TII signal in a broadcasting stream transmitted from a transmitter. A carrier power detecting module(108) detects carrier power by using FFT(Fast Fourier Transformed) TII signal according to the TII timing information. A TII decoder(110) decodes the FFT TII signal if the detected carrier power is higher than a predetermined reference value. A disaster notification signal generating module(112) generates a disaster notification signal if a disaster region code value is consistent with a location code value of the transmitter in the decoded TII signal. A control module(114) generates a control signal for notifying generation of disaster according to the disaster notification signal.

Description

Disaster Broadcasting Receiving Apparatus and Method of Terrestrial DMB Receiver {APPARATUS AND METHOD FOR RECEIVING A DISASTER AIR IN A T-DMB}

1 is a block diagram illustrating the inside of a terrestrial DMB receiver to which an apparatus for receiving a disaster broadcast according to an exemplary embodiment of the present invention is applied.

2 is a flowchart illustrating a disaster broadcast reception process according to an embodiment of the present invention.

3 is a flowchart illustrating a disaster broadcast reception process according to another embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

100: RF module 102: MPEG decoder

104: transparency control module 106: TII timing detection module

108: carrier power detection module 110: TII decoder

112: disaster alert signal generation module 114: control module

116: power supply control module 118: warning message sending module

120: timer

The present invention relates to a terrestrial DMB receiver, and more particularly, to an apparatus and method for receiving a disaster broadcast of a terrestrial DMB receiver.

Since sudden earthquakes and tsunamis can cause enormous loss of life and disasters, it is important to effectively establish a forecasting system along with disaster recovery to minimize damage in the event of a disaster.

The conventional technology is a disaster broadcasting technology using analog broadcasting, which has a unidirectionality, so that it is possible to guide disaster broadcasting, but it is not possible to accurately identify and follow up the disaster area.

On the other hand, the conventional technology of delivering a disaster alert to an unspecified number using mobile communication has a problem in that it is difficult to secure the concurrency of disaster broadcasting due to the limitation of data transmission amount.

On the other hand, in the prior art using cable and satellite broadcasting, there is a problem in that it is impossible to receive a disaster broadcast of a mobile receiver because of the limitation of the location that can be received only in the home due to the characteristics of the medium.

An object of the present invention is to solve the problems of the prior art, by generating a disaster notification signal by analyzing the TII signal of the disaster broadcast or normal stream in the standby mode or normal mode state, it can inform the user of the occurrence of the disaster The present invention provides an apparatus and method for receiving a disaster broadcast of a terrestrial DMB receiver.

In order to achieve the above object, the present invention provides a disaster broadcast reception apparatus in a terrestrial DMB receiver, comprising: a TII timing detection module for detecting timing information of a TII signal in a broadcast stream transmitted from a transmitter; A carrier power detection module for detecting carrier power using a fast Fourier transformed TII signal, a TII decoder for decoding a fast Fourier transformed TII signal when the detected carrier power is equal to or greater than a predetermined reference value, and the decoded TII signal; And a disaster notification signal generation module for generating a disaster notification signal when the disaster area code value and the location code value of the transmitter are the same, and a control module for generating a control signal for informing the occurrence of the disaster according to the disaster notification signal.

In another aspect, the present invention is a method for receiving a disaster broadcast in a terrestrial DMB receiver, comprising: detecting timing information of a TII signal in a disaster broadcast stream transmitted from a transmitter in a standby mode, and performing fast Fourier transform according to the TII timing information; Detecting carrier power by using the received TII signal, and decoding the fast Fourier transformed TII signal when the detected carrier power is equal to or greater than a predetermined reference value, and then disaster area code value and position of the transmitter in the decoded TII signal. Determining whether the code values are the same; and in the same case, generating a disaster notification signal to release the standby mode state.

In addition, the present invention is a method for receiving a disaster broadcast in a terrestrial DMB receiver, the method comprising: detecting timing information of a TII signal in a general broadcast stream transmitted from a transmitter in a normal mode, and performing fast Fourier transform based on the TII timing information; Detecting carrier power using a TII signal; decoding the fast Fourier transformed TII signal when the detected carrier power is equal to or greater than a predetermined reference value; And determining whether the location code values are the same, and generating a warning signal or a warning message by generating a disaster notification signal in the same case.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating the inside of a terrestrial DMB receiver to which an apparatus for receiving a disaster broadcast according to an exemplary embodiment of the present invention is applied.

Referring to FIG. 1, the terrestrial DMB receiver includes an RF module 100, an MPEG decoder 102, a transparency control module 104, a TII timing module 106, a carrier power detection module 108, a TII decoder 110, The disaster notification signal generation module 112, the control module 114, the power control module 116, the warning message sending module 118 and the timer 120 are included.

Here, the RF module 100 receives a terrestrial RF broadcast signal through a receiving antenna, converts a signal of a desired channel among the RF broadcast signals into an IF signal, converts the converted IF analog signal into a digital signal, and then in-phase ( I) The signal and quadrature (Q) signal are separated, and the time and frequency synchronization is corrected, followed by a fast Fourier transform (FFT) for converting time data into frequency data and output.

The MPEG decoder 102 source-decodes the MPEG data output from the RF module 100 and then outputs it to an external display device such as an LCD through the transparency control module 104.

The TII timing detection module 106 detects null symbols from the analog broadcast signal in the RF module 100 of the terrestrial DMB receiver and then detects timing information of the TII signal using the detected null symbols.

The carrier power detection module 108 transmits a fast Fourier transformed TII signal according to the TII timing information to determine whether TII information is present in a disaster broadcast or general broadcast stream received by the terrestrial DMB receiver in a standby mode or a normal driving state. Acquired through 100 to detect carrier power. The TII stores a disaster area code value and a location code value of a transmitter that transmits a broadcast stream, and the TII timing information includes a generation period and a generation / end time point of the TII signal.

The TII decoder 110 decodes the fast Fourier transformed TII signal when the detected carrier power value is greater than or equal to a predetermined reference value and transmits a location code value and a disaster area code value of a transmitter for transmitting a broadcast stream in a fast information channel (FIC) header part. It extracts and provides it to the disaster notification signal generation module 112.

The disaster notification signal generation module 112 generates a disaster notification signal and provides it to the control module 114 when the location code value and the disaster area code value match. When the location code value and the disaster area code value are the same, the disaster notification signal generation module 112 generates a disaster notification signal to inform that the location of the terrestrial DMB receiver is in a disaster area.

The control module 114 controls the power control module 116 to release the standby mode state of the terrestrial DMB receiver in response to the disaster notification signal to supply power to the terrestrial DMB receiver or to the display device through the MPEG decoder 102. A control signal for controlling the transparency of the displayed general broadcast stream is generated and provided to the transparency control module 104, or a control signal is generated and provided to the warning message sending module 118 to notify of a disaster.

When the standby mode is converted to the normal operation mode, the terrestrial DMB receiver receives the broadcast stream received through the disaster broadcast channel through the RF module 100 and displays it on the external display device through the MPEG decoder 102.

The timer 120 operates based on the timing information detected by the TII timing detection module 106 in the standby mode, and operates while the TII signal is not received. As the operation of the timer 120 is stopped, the power control module 116 transmits an RF module 100, a TII timing detection module 106, a carrier power detection module 108, and a TII decoder so that a disaster broadcast stream can be received. 110, powers the disaster alert signal generation module 112 and the control module 114, and drives only the control module 114 and the timer 120 when the timer 120 is in operation.

Accordingly, the transparency control module 104 adjusts the transparency of the screen of the general broadcast stream displayed on the display device and displays it on the display device.

The warning message sending module 118 sends a predetermined warning sound through the speaker or sends a predetermined message to the display device in response to the control signal.

A process of receiving a disaster broadcast by the terrestrial DMB receiver having the above configuration will be described with reference to FIGS. 2 to 3.

2 is a flowchart illustrating a disaster broadcast reception process according to an embodiment of the present invention.

Referring to FIG. 2, first, when the terrestrial DMB receiver is powered off according to a user's request while receiving a service normally, it enters a standby mode (S200).

In the standby mode as in step S200, the power control module 116 of the terrestrial DMB receiver includes the RF module 100, the TII timing detection module 106, the carrier power detection module 108, the TII decoder 110, and the disaster notification signal. Power is supplied to the generation module 112 and the control module 114.

Accordingly, the RF module 100 receives the disaster broadcast stream through the disaster broadcast channel serviced by the transmitter (S202), and the TII timing detection module 106 receives the analog broadcast signal from the RF module 100 of the terrestrial DMB receiver. After detecting the null symbols from the detection of the timing information of the TII signal using the detected null symbols to provide it to the carrier power detection module 108 (S204).

The carrier power detection module 108 obtains a fast Fourier transformed TII signal through the RF module 100 according to the TII timing information to determine whether TII information exists in the disaster broadcast stream, and then detects carrier power. It is determined whether the power value is equal to or greater than a predetermined reference value (S206, S208).

As a result of the determination in step S208, if the detected carrier power value is equal to or greater than a predetermined reference value, the TII decoder 110 decodes the TII signal, extracts the transmitter location code value and the disaster area code value from the FIC header, and generates a disaster notification signal generation module. In operation S210, the process proceeds to step S202 and performs a subsequent step.

The disaster notification signal generation module 112 determines whether the location code value and the disaster area code value match (S212).

As a result of the determination in step S212, in case of a match, the disaster notification signal generating module 112 generates a disaster notification signal and provides it to the control module 114 to notify that the user of the terrestrial DMB receiver is in the disaster area. ) Supplies power to the terrestrial DMB receiver by controlling the power control module 116 to normally drive the terrestrial DMB receiver in a standby mode. Accordingly, the terrestrial DMB receiver receives the disaster broadcast stream (S214).

According to an embodiment of the present invention, by generating a disaster notification signal by analyzing a TII signal of a disaster broadcast stream in a standby mode, a user can be notified of a disaster occurrence.

3 is a flowchart illustrating a disaster broadcast reception process according to another embodiment of the present invention.

Referring to FIG. 3, in the normal mode, the RF module 100 receives a general broadcast stream through a broadcast channel serviced by a transmitter (S300), and the TII timing detection module 106 is a terrestrial DMB receiver. After detecting null symbols from the analog broadcast signal in the RF module 100, the timing information of the TII signal is detected using the detected null symbols and then provided to the carrier power detection module 108 (S302).

The carrier power detection module 108 obtains a fast Fourier transformed TII signal through the RF module 100 according to the TII timing information to determine whether TII information exists in the disaster broadcast stream, and then detects carrier power. It is determined whether the power value is equal to or greater than a predetermined reference value (S304, S306).

As a result of the determination in step S306, when the detected carrier power value is equal to or greater than a predetermined reference value, the TII decoder 110 decodes the TII signal, extracts the location code value and the disaster area code value of the transmitter, and sends the signal to the disaster notification signal generating module 112. If not (S308), otherwise proceeds to step S300 and performs the subsequent steps.

The disaster notification signal generation module 112 determines whether the location code value and the disaster area code value match (S310).

As a result of the determination in step S310, in order to inform that the user of the terrestrial DMB receiver is in a disaster area, the disaster notification signal generating module 112 generates a disaster notification signal and provides it to the control module 114 (S312). The module 114 provides a control signal for controlling the transparency of the broadcast stream currently displayed through the display device to the transparency control module 104 or sends a control signal for outputting a predetermined warning sound or a message. To provide.

Accordingly, the transparency control module 104 adjusts the transparency of the screen of the broadcast stream displayed on the display device to display the display device on the display device, or the warning message sending module 118 responds to the control signal through a speaker. In operation S312, the controller transmits a predetermined message to the display apparatus.

According to another embodiment of the present invention, by generating a disaster notification signal by analyzing the TII signal of the general broadcast stream, it is possible to inform the user of the occurrence of a disaster.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention generates an emergency notification signal by analyzing a TII signal of a disaster broadcast stream or a general broadcast stream in a standby mode or a normal mode, thereby informing a user of a disaster occurrence.

Claims (10)

Disaster broadcast receiver in terrestrial DMB receivers, A TII timing detection module for detecting timing information of a TII signal in a broadcast stream transmitted from a transmitter; A carrier power detection module detecting carrier power using a fast Fourier transformed TII signal according to the TII timing information; A TII decoder for decoding a fast Fourier transformed TII signal when the detected carrier power is equal to or greater than a predetermined reference value; A disaster notification signal generation module for generating a disaster notification signal when the disaster area code value and the location code value of the transmitter are the same in the decoded TII signal; A control module for generating a control signal for notifying the occurrence of the disaster according to the disaster notification signal Disaster broadcast receiving apparatus in a terrestrial DMB receiver comprising a. The method of claim 1, Disaster broadcasting receiver of the terrestrial DMB receiver further comprises a power control module for controlling the power of the terrestrial DMB receiver. The method of claim 2, The TII timing detection module detects timing information of a TII signal in the disaster broadcast stream when the terrestrial DMB receiver is in a standby mode. And the control module releases the standby mode by controlling the power control module according to the disaster notification signal and supplying power from the terrestrial DMB receiver to release the standby mode. The method of claim 1, And a transparency control module for controlling the transparency of the broadcast stream which is MPEG-decoded and displayed on a display device. The method of claim 4, wherein The control module generates a control signal for controlling the transparency as the disaster notification signal is received to control the transparency of the broadcast stream displayed on the display device. . The method of claim 2, In the standby mode, the timer further includes a timer that is driven for a time when the TII signal is not received based on the TII timing information. And the control module receives the broadcast stream from the transmitter by controlling the power control module when the timer is stopped. The method of claim 1, And a warning message transmitting module for transmitting a predetermined warning sound or message in response to the control signal. As a method of receiving a disaster broadcast in a terrestrial DMB receiver, Detecting timing information of a TII signal in a disaster broadcast stream transmitted from a transmitter in a standby mode; Detecting carrier power using a fast Fourier transformed TII signal according to the TII timing information; If the detected carrier power is greater than or equal to a predetermined reference value, decoding the fast Fourier transformed TII signal and determining whether a disaster area code value is equal to a location code value of the transmitter in the decoded TII signal; As a result of the determination, generating a disaster notification signal to release the standby mode state in the same case Disaster broadcast receiving method of the terrestrial DMB receiver comprising a. As a method of receiving a disaster broadcast in a terrestrial DMB receiver, Detecting timing information of a TII signal in a general broadcast stream transmitted from a transmitter in a normal mode; Detecting carrier power using a fast Fourier transformed TII signal according to the TII timing information; If the detected carrier power is greater than or equal to a predetermined reference value, decoding the fast Fourier transformed TII signal and determining whether a disaster area code value is equal to a location code value of the transmitter in the decoded TII signal; As a result of the determination, generating a warning signal or a warning message by generating a disaster notification signal in the same case Disaster broadcast receiving method of the terrestrial DMB receiver comprising a. The method of claim 8, And adjusting the transparency of the general broadcast stream and displaying the same on the display device in response to the disaster notification signal.
KR1020070015301A 2007-02-14 2007-02-14 Apparatus and method for receiving a disaster air in a t-dmb KR20080075991A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100977984B1 (en) * 2010-03-19 2010-08-25 에이앤디엔지니어링 주식회사 Apparatus and method for receiving digital emergency warning broadcasting message

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100977984B1 (en) * 2010-03-19 2010-08-25 에이앤디엔지니어링 주식회사 Apparatus and method for receiving digital emergency warning broadcasting message

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